Pop songs are 200 seconds lengthy as a result of the mechanical properties of 78 and 45 rpm data can ship one tune with first rate constancy of that size. They’ll’t deal with ten minutes, and one minute is just too brief to cost for.
The variety of books carried by a neighborhood bookstore was the correct amount to stability paying the hire and satisfying most prospects. And the variety of books printed mirrored the truth that the one technique to get a brand new guide in was for the shop to take one out.
Films are lengthy sufficient to justify shopping for a ticket, however not so lengthy that the theater can’t have a number of showings.
Books are round 350 pages as a result of pamphlets are too exhausting to promote and books which can be too lengthy are exhausting to bind and manipulate.
Sitcoms are half an hour lengthy as a result of two sitcoms an hour maximizes the doable viewers greater than extending one to double the size may.
The newspaper is the size it usually is as a result of the editors are balancing the time every subscriber can spend with it in opposition to the writer’s need to promote essentially the most worthwhile variety of advertisements. “All of the information that matches.”
When know-how modifications the media, when distribution and consumption shift, the definition of simply the appropriate size shifts as properly. Podcasts modified the size of interviews, Linkedin modified the size of a resume and YouTube modified the size of humorous movies… the cycle continues.
